Q. 64.5( 13 Votes )

A metal M forms an oxide having the formula M2O3. It belongs to the third period in the modern periodic table. Write the atomic number and valency of the metal.

Answer :

Since the Molecular formula of oxide of a metal (M) is M2O3 where valency of oxygen is 2 and the valency of the metal is 3. Since the metal has a valency of 3 and belongs to the third period, so the metal is Aluminium.


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